Space and Water Heating Systems

RdSAP Convention 6.10: PV-boost immersion heating
There are systems currently available where electricity from solar PV panels are used to boost hot water producing within a hot water cylinder. The two dev...
Tue, 11 Feb, 2020 at 1:06 PM
Boilers not in PCDB
The Technical Support team get a number of queries each week in relation to boilers which may or may not appear in the product database. In order to resolve...
Tue, 9 Feb, 2021 at 12:15 PM
Lot20 Compatible Storage Heaters
Lot20 is a European standard introduced in January 2018 for the manufacture of storage heaters. It specifies that manufacturers must include the following f...
Wed, 13 Jan, 2021 at 2:38 PM
Hive and Nest Control Systems
  CPD AVAILABLE: RdSAP Heating Controls The Hive and Nest-type heating controls are becoming more and more prevalent in domestic settings, but DEA...
Tue, 17 Sep, 2019 at 4:36 PM
Room Thermostat and TRVs but no programmer
  CPD AVAILABLE: RdSAP Heating Controls Some heating systems are set up with a room thermostat and TRVs, but no programmer. This isn't a ...
Tue, 17 Sep, 2019 at 4:37 PM
Water heating option 'from Main heating' not available
Occasionally, you might get a scenario where you have entered a boiler, but the option for water heating 'from main system' is not available in with...
Tue, 11 Feb, 2020 at 4:18 PM
Illustrative PCDB model
Energy Assessors may have noticed that the Product Characteristics Database displays a number of 'illustrative devices', usually for heat pumps and ...
Tue, 11 Feb, 2020 at 4:20 PM
PulsaCoil 2000/Class A
We frequently get questions about how best to input a PulsaCoil device into RdSAP. The are a number of Conventions at play, but it's easy once you k...
Tue, 16 Feb, 2021 at 9:59 AM
Special Condition 18
Convention 4.11: LPG at mains gas prices (e.g. special condition 18 or special condition 11F) The former Special Condition was written into the contract...
Fri, 2 Oct, 2020 at 4:18 PM
Plant size ratio out of range (heat pumps)
When inputting a heat pump from the PCDB, on rare occasions, the software may flag an error which would prevent calculation, such as: When this occurs, a...
Thu, 10 Dec, 2020 at 11:35 AM